Question about 2002 GMC Envoy
Knocking can usually be traced to a lack of lubrication, old engine oil, or a batch of bad gasoline. If you can determine where the knocking is coming from, it would be easier to narrow it down. If the knocking is coming from the dome cover area, you may have a leak around the dome cover gasket, preventing oil from properly lubricating the rocker arms.
Posted on Feb 18, 2012
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Posted on Jan 02, 2017
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